Automatic stop motion for drawing frames



May 2O 1924. l

E'. C. WOODCOCK AUTOMATIC STOP, MTION FOR DRNAWINCI-FRAMES AFiled May 19. 1923. -3 sheets-sheet;

May 20 1924. l

E. C. WOODCOCK AUTOMATIC sToP MOTION FOR DRAWING'FRAMES Filed May 19.- 192s 3 shrs-sheet 2 May 20 1924. 1,494,829

E. c. wooDcocK AUTOMATC STOP MOTION FOR DRAWING FRAMES Filed May 1 9. 1923 heets-Sheet 3 Patented May 20, 1924.

Meran narran stares paraat carica.

EUGENE c. wooncocx, or ELMHUEs'r, NEW YORK, Assrenon To CHELSEA FIERE MILLs, oF BROOKLYN, NEW YORK.

AUTOMATIC STOP lfOTION FOR .DRAWING FRAMES.

Application filed May 19,

To all whom t may concern:

Be it known that EUGENE C. iVoonoooK, a citizen of the United States, residing at Elmhurst, New York, in the county of Queens and State of New York, has invent# ed certain new and useful Improvements in Automatic Stop Motions for Drawing Frames, of which the following is a speciiication.

This invention relates to stop motions for drawing frames, and particularly to stop motions applicable to the back of a second drawing frame fo'stopping the operation of the machine to prevent a sliver or broken strand from passing therethrough.

An object ofthe invention is to provide strand controlled means operable for releasing a shifting mechanism normally adapted to disengage the driving connection ofthe machine with a source of power.

Another object of the invention resides in providing normally operable shifting means for disconnecting the power shaft of a drawing frame from a source of power, an oscillat-ing shaft having connection with a r0- tatable shaft in the frame for imparting an oscillating motion to the shaft during the operation of the frame together with means controlled by the strand or strands of fiber passing through the frame adapted to hold the shifting means in position to connect the power shaft of the frame with the source of power and operable through a connection with the operating shaft upon the breaking of a strand for releasing the shifting means for permitting the operation thereof for stopping the operation of the frame.

Another object of the invention resides .in providing a feeler for the fiber strands passing through a drawing frame and controlled thereby adapted for operation upon the breakage or slivering of a strand by a continuously operating means for releasing a shifting means operable for disconnecting the power shaft of the frame from the source of power for stopping the operation of the frame.

ik further `object of theV invention is to provide the feeler structure having the portion engaging the strand of iibe-r adapted for relative movement with the remaining ortion of the feeler and also for cooperation with a continuously operating means adapted to operate the feeler upon the breakage of a strand for releasing and per- 1923. Serial No. 640,233.

mitting the operation of means to stop vthe operation of the frame, the strandengaging portion of the feeler being relatively movable from the normal position for engaging a strand adapted for rendering it inoperative relative to the continuously operating means, in which position the feeler will not function during the operation of the frame and will also act as a signal to indicate that it is in inoperative position.

The invention comprehends other objects and advantages in theV details of construetion and association of parts which is Vmore particularly described in the following de'- tailed description and in the claims, it being understood however, that variations may be made in the structure without departing from the spirit and scope of the invention.

In the drawings, forming part of this application,

Figure 1 is an end elevation of the back portion of the drawing frame to which the invention is applied. Figure 2 is a rear elevation of the structure shown in Figure l, at one end portion of the machine.

Figure 3 is a plan view thereof.

Figure 4 is a detail sectional view thru the feeler arm.

Figure 5 is a detail end view of the feeler arm shown in Figure 4, illustrating 'the formation of the cam. i

A portion of the drawing frame is ind-icated at l o-n which is mounted a plurality of spaced parallel arms 2 carrying at their outer ends a spacing or guide shaft 3l which extends across the rear side of the frame and formed with guides for receiving the fiber strands for guiding them into the drawing mechanism ofthe frame. A power shaft is indicated in dotted lines in Figure Vl at 5 from which the powerfor driving the mechanism of the frame is derived and which is connected with a source of power through a belt connection passing o-ver the pulleyV 6 mounted on the power shaft', this being the usual construction of drawing frame now in use, having a. loose and tight pulley mounted on the power shaft so that the belt may be shifted one to the other when it is desired to throw therpower oi or on for operating the machine.

A ben Shifting Ever is indicated 3.1-, 7 in dotted lines in Figure l, which is adapted for-operation through the rotationvof the shaft 8 extended transversely on one end of the machine and on which the shifter lever is mounted. i

A rotatable shaft 9 is provided at the top portion of the frame on which is mounted an eccentric 10 for producing a reciprocating motion of the eccentric rod 11 in the operation of the machine which is connected at one end for operation by the eccentric cam and at the other end with a bell crank lever 12 pivo-tally connected vto the frame as indicated at 13. In order to provide and compensate for the rocking movement of the lever 11 in the operation of a cam, a link 14 is interposed at the'end portion of the lever 11 which is pivotally connected with one arm of the bell crank lever and rotatably connected with the eccentric arm, as clearly shown in Figures 1 and 3 so that the main portion of the eccentric rod 11 will have a relative movement with respect to the link 14 and the bell crank levers 12. The other armcf the bell crank lever is forked to receive the flattened projecting end of an oscillating shaft 15 the forked portions of which are bifurcated for receiving a transverse pin 16 to provide for a rocking connection between the bell crank lever and the shaft in order that in the reciprocating movement of the eccentric rod 11, a corresponding reciprocating movement will be transmitted through the bell crank 12 for producing continuous operation of the sha-ft 15 relative to the frame for purposes to be presently described.

A trip shaft is mounted for axial movement in the arms 2 of the frame, as indicated at 17 and is flattened at the end portion which is providedV with a transversely extending pin for engagement with the forked end of the pivoted latching lever 18 having a lateral latch extension 19 and which is pivoted to a removable bracket 2O as indicated at 21 carried by one of the arms 2 of the frame. The latch member is provided adjacent the pivot 21 with a lug 22 adapted for cooperative engagement with a pivoted pawl 23 adapted to be rocked in one direction by the Vcoil spring 24 having one end anchored to the pawl intermediate the ends thereof as clearly shown in Figure 2 and having the other end anchored to the projection 25 of the shifting arm 26 mounted on the shaft 8 carrying the belt shifter 7, the result being that the spring 24 normall tends to rock the shifting arm 21, the sha t 8 and the belt shifter 7 to the position shown in dotted lines in Figure V2 for shifting the belt onto the loose pulley and stopping the operation of the drawing mechanism carried in the frame. The spring 24 also acts on the pawl 23 and through the depending lug 22 on the locking lever 18 serves to rotate the lever on its pvot for holding it in the position shown in Figure 2 with the trip shaft at one of its limits of movement normally assumed during the operation of the frame. Y

A link member 27 is also pivotally connected to the bracket 2O on the pivot 21 and slidably mounts a holding member 28 through the slot and pin connection 29 with the link 27, the holding member having one end pivotally connected in the forked end of the shifter arm 26 which lalso receives the `slotted end of the link 27 so that the shifter arm is limited in its movement by vthe slot in the link which is indicated at 30. rllhe opposite end of the holding member 28 is provided with a pin 81 which extends through the slot in the link 27 receiving the pin connection 29 and is adapted to engage the shoulder of the latch extension 19 of the latching lever and when held thereby ccun teracts the action of the spring 24 and holds the shaft 8 and the belt shifter to position the belt from the source of power on the tight pulley for driving the power shaft 5 and operating the drawing mechanism in the frame.

A feeler mechanism is indicated generally at 32,' which is mounted for rocking movement on the shaft 17 only one feeler member being shown correspondingwith the strip of fiber 4, however, it being understood that a plurality of these arms are provided in spaced relation on the shaft 17 correspending in number to the number of strips Y of fiber adapted to be fed through the drawing frame, it being unnecessary to illustrate more than one of these members; in View of the fact that all are exact duplicates in construction and operation. Each feeler member 32 includes a transverse substantially U-shaped arm rotatably mounted between spaced collars 34 intermediate its ends as shown in- Figure 4, one end portion being slotted as indicated at 85 for receiving a threaded projection from a balance weight 36 for adjustably positioning the balance weight on the arm through the medium of the thumb nut 37 cooperating with the threaded stud. lThe other end of the arm 33 rotatably receives a head 88 which carries the laterally extending feeler arm 39 adapted for engagement with the liber thread 4. A rod 40 mounted in the head 238 extends through the central portion of the arm 33 and receives Aat the inner end thereof adjacent the shaft 17 a coil spring 41 abutting a washer carried by the end portion of the rod 4() engaging an inwardly directed flange 42 formed in the arm 33 for normally holding the feeler arm and head 38 in assembled relation with respect to the arm 13 but permitting a relative movement of the feeler arm with respect to the arm 33. squared head 43 is mounted on the rod 40 in the central portion thereof for cooperation vwith the spring member 44 the ends of which are secured in the U-shaped arm 33, as clearly shown in Figure 4 for cooperation with the squared head 43 torhold the feeler arm 39 in set position at substantially right angles. The head 38 is provided with a cam projection 45 having a shoulder at one end thereof adapted for cooperation with a collar 46 mounted on the shaft 15 when the feeler arm is in position for cooperation with the ber thread 4 so that upon the breakage or slivering of the thread, the feeler arm 39 and the head 38 will cause a rocking movement of the arm 33 on the shaft 17 so as to move the projection 45 into cooperation with the collar 46 on the oscillating shaft in order to transmit the motion of the oscillating shaft to the shaft 17 for releasing the latch member 18 and the projection 31 of the holding member to permit the operation of the shifter arm 26, the shaft 8 and the belt shifter 7 by the spring 24. However, when the feeler arm 39 is turned to a position at right angles to its normal operative position in engagement with the thread 4 and in a position to project in a substantially vertical plane above thev arm 33, the cam 45 presents a flat surface to the collar 46 so that the oscillating shaft may continue its oscillating movement without affecting or operating the feeler mechanism 32 for operating the latching lever 18. In this position, the-projection of the feeler arm 39 upwardly/from the arm 33 will also serve -as a signal to the operator of the frame to indicate that this particular feeler member is inoperative so that a sufficient number of feeler members may be kept in operation upon threads passing through the drawing Vframe for supplying the required number of threads to the doubling machineV and stopping the operation of the drawing frame when one of the threads slivers or breaks.

From the foregoing description, it will beobserved that the stop motion may be applied to various types of drawing frames now in use, and that in the operation of the machine, the feeler arms are positioned on the threads passing through the machine for cooperation therewith, the threads in entering the machine passing over the guiding shaft 3 and then under the feeler arm 39 and subsequently through the drawing roll of the frame. As long as the threads of fiber passing into the drawing frame are in proper form, the feelers will ride over them and permit the continued operation of the frame, during which time the parts will be held as shown in Figures 1 to 3 inclusive with the shaft 9 rotating and reciprocating the eccentric arm 11 for producing an oscillating motion of the shaft 15 which carries the collar 46. Upon the breaking of any strand of ber or the slivering thereof, the

feeler arm riding on the downwardly, the member being previously balanced to normally assume a horizontal position which is accomplished through the adjustment of the weight 36 on the arm 33 so that the cam 45 will project into the path of movement of the collar 46, so that further oscillation of the shaft will impart a corresponding movement to the shaft 17 which will be operated torock the latching lever 18 about its pivot for releasing the latch extension from the projection' 31 carried by the holding arm 28, this permitting the spring 24 to operate the shifting arm and lever for throwing the power connection into inoperative position with respect to the shaft 5 for stoppin-g the V4drawing frame before the end passes through the drawing roller. The Voperator of the machine immediately'turns the feeler arm 39 to vertical position before piecing the end so that the shifter arm may be moved to shift the strand will drop belt into driving relation with respect to Y the power shaft for starting up the machine in which position the projection 31 rides over the end of the latch extension and locks behind thev shoulder thereon through the operation of the spring 24 acting on the pawl 23 which normally rocks the lever 18 on its pivot for holding the latch extension in position to engage the pin 31. The machine will then continue to operate and after the same is started and the thread which has been pieced is passed through the machine, through the drawing roll, the operator may rock the feeler member upwardly on the shaft 17 and rotate the feeler arm 39 into the position shown in Figure. 3 for further cooperation with the liber thread in order to subsequently operate to stop the machine upon another breakage of the thread.

What is claimed is:

1. In combination, a drawing frame having a power shaft provided with driving les means shiftable to connect or disconnect said" shaft, with a source of power, shifting means for the driving means, normally operable to disengage the power shaft from the source of power, means for holding the shifting means in positionto connect the power shaft with thesource of power, releasing means for the holding means having strand controlled elements forming a part thereof, and anaxially oscillating shaft, adaptend to engage said'strand controlled element lipon the breakage of a strand for operating said element to operate the releasing means for permitting -the operationv -of the shifting means. Y

'2. In combination, a drawing frame having a power shaft provided with driving means shiftable to connect or disconnect said shaft, with a source of power, shifting means for the driving means, normally ,operi able to disengage the power shaft from the source of power, means for holding the shifting means in position to connect the power shaft with the source of power, releasing means for the holding Vmeans having a shaft axially movable in said drawing frame, and provided with strand controlled elements mounted for rocking movement on said shaft, a second shaft mounted on said frame for continuous aXia-l oscillation in the operation of the machine, said strand controlled elementsibeing adapted for engagement with and operation by said second mentioned oscillating shaft upon the breakage of a strand whereby an axial movement of the first mentioned shaft and the releasing means is effected for releasing the shifting means and permitting the operation thereof.

3. In'combination, a drawing frame having a power shaft provided with driving means shiftable to connect or disconnect said shaft with a source of power, shifting means forthe driving means normally operable to disengage the power shaft from the source of power, latching means for mounting on the frame for latching the shifting means in position to connect the source of power with the power shaft, a trip shaft movably mounted in the frame, a plurality of feeler members mounted on the trip shaft normally adapted to lie in a horizontal plane, and also adapted for cooperation with a strand of fiber passing into the frame in an angular position to the normal horizontal position thereof, and an oscillatable shaft 'mounted in spaced parallel relation with the frame with respect to the trip shaft, and provided with a plurality of spaced collars, means operable from the power shaft for producing a continued oscillation of said oscillatable shaft during the operation of the drawing frame, said feeler members being adapted for cooperation with the collars on said oscillating shaft whereby when a strand breaks or slivers the feeler arm riding on said strand will rock on the trip shaft for assuming the normal horizontal position and will cooperate with thecorresponding collar` on the oscillatable shaft for imparting a movement to the trip shaft for tripping the latching means and permitting the operation of the tripping means to disconnect the source of power from the power shaft.

ln combination, a drawing frame having a power shaft provided with driving ,means shiftable to connect or disconnect said shaft with a source of'power, shifting means for the driving means normally operable to disengage the power shaft from the source of power, latching means carried by the frame operable for holding the shifting means in position to connect the source of owerwith said power shaft a trip shaft sliY able in frame adapted or operating necesa@ the latch means, a feeler member mounted for rocking movement on the trip shaft including an arm having an adjustable weight mounted on one end portion thereof for balancing the arm so that it will normally assume a position in a horizontal plane, a laterally projecting feeler arm carried by the other end of said arm and rotatable relative thereto, said feeler arm being adapted for cooperation with a strand of fiber passing into the frame for holding the arm in unbalanced position, the feeler arm having a cam projection thereon, and means for holding said feeler arm in position for cooperation with the strand of fiber or at substantially right angles thereto, and an oscillatable 'shaft mounted in the frame and having connection with the power shaft for producing a continuous oscillation'of said shaft during the operation of the frame, said oscillatable shaft being provided with a collar adapted for cooperation with the cam on said feeler arm, whereby the breaking or slivering of a thread will permit the feeler member cooperating therewith to assume a horizontal position for permitting the cooperation of the cam and collar to produce a movement of the trip shaft for tripping the latching means and permitting the operation of the shifting means to disconnect the power shaft from the source of power, said cam being adapted for slidable engagement with the collar when the feeler arm is positioned at right angles to the position normally assumed in cooperation with the strand.

5. ln combination, a drawing frame having a power shaft provided with driving means shiftable to connect or disconnect said shaft with a source of power, shifting means for the driving means normally operable to disengage the power shaft from the source of power having a shifting arm mounted'on a shaft carrying a belt shifter and connected at one end to a slidable holder member, latching means mounted on the frame adapted for cooperation with the holding means for holding the shifting means in position to connect the power shaft with the source of power, resilient means having one end connected to a depending projection on said shifting arm and the other end connected for operating said latching means'to normally position it for cooperation with the holding means, and strand controlled means for tripping the latching means upon the breakage of the strand upon releasing the holding member to permit the operation of the shifting means to disengage the power shaft from the source of power.

fn testimony whereof I aix my signature. 

